结合火灾科学基础理论的研究成果,分析了建筑火灾中较为常见的窗口传播火灾的发生机理,指出窗口延伸出的火焰实际上是起火建筑室内自然扩散火焰中的间歇火焰区,联系消防技术规范有关防火挑檐的有关规定以及实际火灾中出现的“火舌”现象,提出了建筑火灾中间歇火焰的垂直蔓延的灭火战术。 Combining with the research results of fire science basic theory, the paper analyzes the mechanism of window fire spreading which is common in building fires, and points out that the flame extending from the window is actually the intermittent flame zone in the natural diffusion fire in the fire building. Fire Cornice and the relevant provisions of the actual fire in the emergence of “flames” phenomenon, put forward a building fire intermittent vertical flame spread fire fighting tactics.